Testing Guides & Best Practices

A practical, opinionated deep dive into the Model Context Protocol (MCP): how it works, why it matters, security/governance trade‑offs, capability discovery, and a step-by-step guide to building an MCP server that safely exposes internal tools to IDE copilots and agentic workflows.

A practical, opinionated guide to building pre-prompt middleware for Claude that injects PM context, acceptance criteria, and coding standards into every LLM call, improving consistency and velocity without boilerplate.

Quantum‑safe defaults are landing in TLS, SSH, and code signing. Enable hybrid X25519+Kyber, plan key/cert rotations, test compatibility, and prep CI/CD and Sigstore for PQC—without breaking clients or blowing SLOs.

A pragmatic 2025 guide to adopting HTTP/3/QUIC for internal APIs: when it beats HTTP/2, gRPC over h3 support, 0‑RTT and amplification risks, LB/proxy readiness, observability and mTLS pitfalls, and a step‑by‑step migration and fallback plan.

Stop performance regressions before prod. Capture EXPLAIN plans in CI, diff fingerprints across PRs, set per-query latency and row-est budgets, and tame plan churn with stable stats, hints, and seeded test data for ORMs.

A hands-on playbook for overload-proof systems in 2025: token buckets, concurrency limiters, queue time SLOs, adaptive shedding, hedged requests, bulkheads, and end-to-end flow control using Envoy, gRPC, and Kubernetes.

Turn fuzzing from a weekend experiment into a reliable quality gate. Learn how to wire libFuzzer and AFL++ into CI/CD, build seed corpora, use ASan/UBSan, triage crashes, and fuzz HTTP/JSON/gRPC—not just parsers—across C/C++, Rust, and Go.

A technical, opinionated guide to Valkey, Microsoft Garnet, Dragonfly, and KeyDB after Redis’s licensing pivot—covering protocol/modules, clustering, persistence, performance tradeoffs, and a phased, low-risk migration and rollback playbook.

A practical, opinionated guide to safely refactor thousands of files with LLMs in 2025: generate codemods, enforce AST and compile guarantees, run gold‑set evals, gate through CI and merge queues, and orchestrate staged multi‑repo rollouts with canaries, bisection, and auto‑reverts.

A practical blueprint to push data quality upstream with contracts-as-code, CI gating, schema evolution, lineage, and replay strategies so analytics and ML do not break.

Eliminate serverless cold starts by snapshotting runtimes. A deep, practical comparison of CRaC/CRIU, AWS Lambda SnapStart, and Firecracker—including init hooks, secrets and DB reconnects, reproducible builds, observability, and CI test strategies.

Why teams are pulling analytics into the app in 2025: query Parquet/CSV/S3 locally, stream Arrow batches over Flight, run DuckDB in WebAssembly, and ship BI without Spark. Patterns, limits, benchmarks methodology, and a migration playbook.

A practical, opinionated guide for shipping one JavaScript package everywhere: Node, Bun, Deno, and Edge Workers. Covers ESM/CJS and exports maps, Web vs Node APIs, fetch/streams quirks, N‑API vs FFI, native add‑ons, permissions, deterministic builds, test matrices, CI, and performance pitfalls.